公开(公告)号：US4008428A

公开(公告)日：1977-02-15

申请号：US647110

申请日：1976-01-07

Applicant: Hermann Waldmann ,  Manfred Weibelzahl

Inventor： Hermann Waldmann ,  Manfred Weibelzahl

IPC: H02M5/25 ,  H02M5/27 ,  H02P13/30

CPC classification number: H02M5/271

Abstract: A circuit arrangement is disclosed having an odd number of Y-connected frequency converters. The control units of the frequency converters are associated with current regulators, all of which are addressed by an additional common reference value. In accord with the invention, the aforesaid reference value is derived by generating a difference voltage corresponding to the difference of the voltages at the neutral point of the frequency converter circuit and the neutral point of the load. This difference voltage is then passed through a delay member whose time constant corresponds to the time constant of the load to develop the reference value.

Abstract translation: 公开了具有奇数个Y连接变频器的电路装置。 变频器的控制单元与电流调节器相关联，所有这些都通过额外的公共参考值来解决。 根据本发明，通过产生与变频器电路的中性点的电压差和负载的中性点相对应的差分电压来导出上述参考值。 然后，该差值电压通过延迟部件，时间常数对应于负载的时间常数以产生参考值。

公开(公告)号：US4673823A

公开(公告)日：1987-06-16

申请号：US813879

申请日：1985-12-27

Applicant: Shigeru Tanaka

Inventor： Shigeru Tanaka

IPC: H02J3/36 ,  H02M5/27 ,  H02P13/30

CPC classification number: H02M5/27 ,  H02J3/36 ,  Y02E60/60 ,  Y02P80/112 ,  Y10T307/25 ,  Y10T307/735

Abstract: Power is fed to a plurality of loads by a respective plurality of circulating current type cycloconverters connected to an ac power supply. A power compensating capacitor common to the cycloconverters is provided at the ac power receiving-end to deliver a leading reactive power to the ac power supply. Further, each cycloconverter is provided with means for delivering a circulating current and means for delivering a circulating current command value to the circulating current control means. A lagging reactive power corresponding to the leading reactive power by the power factor compensating capacitor is delivered to the ac power supply. The power factor compensating capacitor may be configured so that its capacity is variable by changing the number of stages connected. In addition, the circulating current command value may vary depending upon the peak value of the current flowing in each cycloconverter.

Abstract translation: 通过连接到交流电源的相应的多个循环电流型循环变频器将功率馈送到多个负载。 在交流电力接收端提供了循环变换器公共的功率补偿电容器，以向交流电源提供引导的无功功率。 此外，每个循环换流器设置有用于输送循环电流的装置和用于将循环电流指令值递送到循环电流控制装置的装置。 通过功率因数补偿电容器对应于前导无功功率的滞后无功功率被传送到交流电源。 功率因数补偿电容器可以被配置为使得其容量可通过改变所连接的级数来变化。 此外，循环电流指令值可以根据在每个循环换流器中流动的电流的峰值而变化。

公开(公告)号：US4303972A

公开(公告)日：1981-12-01

申请号：US95820

申请日：1979-11-19

Applicant: Eric J. Stacey ,  Donal E. Baker ,  Charles L. Doughman ,  Ralph D. Jessee

Inventor： Eric J. Stacey ,  Donal E. Baker ,  Charles L. Doughman ,  Ralph D. Jessee

IPC: H02M5/27 ,  H02P13/30

CPC classification number: H02M5/27

Abstract: The firing pulses to the nonload carrying bank only of the naturally commutated thyristor power circuit of a static power converter are retarded to reduce or eliminate the interbank circulating current. In one form of the invention, half wave rectified load current signals are summed with the output waveform reference signal applied to the positive and negative bank firing pulse generators in a sense to retard the pulses in the nonload carrying bank. In another form of the invention, the inversion end stops are used to generate the retarded firing pulses in the nonload carrying bank.

Abstract translation: 延迟到静态功率转换器的自然换向晶闸管电源电路的无负载库的点火脉冲，以减少或消除同步循环电流。 在本发明的一种形式中，半波整流负载电流信号与施加到正和负组触发脉冲发生器的输出波形参考信号相加，从而阻止无负载载波组中的脉冲。 在本发明的另一形式中，使用反转端止动件来产生无载运行组中的延迟点火脉冲。

公开(公告)号：US4680695A

公开(公告)日：1987-07-14

申请号：US922775

申请日：1986-10-27

Applicant: Russel J. Kerkman ,  Timothy M. Rowan

Inventor： Russel J. Kerkman ,  Timothy M. Rowan

IPC: H02M7/48 ,  H02P21/00 ,  H02P27/04 ,  H02P13/30 ,  H02P5/40

CPC classification number: H02M7/48

Abstract: A current regulator for a variable frequency power supply includes a proportional plus integral circuit that produces a composite control output signal for each phase. To improve the performance of the current regulator at higher frequencies, the composite control output signal for each phase also inlcudes a cross coupled component which is produced by multiplying a d.c. signal proportional to frequency times an integrator output signal from another phase. The composite control signals are applied to a voltage source inverter which produces the output currents to a load.

Abstract translation: 用于可变频率电源的电流调节器包括比例积分电路，其产生用于每个相位的复合控制输出信号。 为了提高电流调节器在较高频率下的性能，每相的复合控制输出信号还包括一个交叉耦合分量，该交叉耦合分量是通过将直流 与频率成比例的信号乘以来自另一相的积分器输出信号。 复合控制信号被施加到产生到负载的输出电流的电压源逆变器。

公开(公告)号：US4420804A

公开(公告)日：1983-12-13

申请号：US296113

申请日：1981-08-25

Applicant: Hisao Nishino

Inventor： Hisao Nishino

IPC: H02M3/335 ,  H02P13/22 ,  H02P13/30

CPC classification number: H02M3/33507

Abstract: A control circuit for a main switching transistor in a switching regulator, wherein PWM pulses are produced by varying a DC bias of triangular-wave pulses in response to a detected error signal, and which pulses are provided as a control signal for switching on and off the main switching transistor. In order to reduce power dissipation due to carrier storage at each turn-off operation of the switching transistor, a negative voltage potential is produced by a diode and a capacitor from square-wave pulses of a constant repetition frequency from which pulses the triangular-wave pulses are formed, and is applied to an emitter of an NPN transistor which operates as a variable impedance circuit for varying the DC bias of the triangular-wave pulses in response to the error signal, so that the triangular-wave pulses are biased to a negative voltage potential. Therefore, the base of the switching transistor rapidly drops down to a negative voltage potential at the time of each turn-off operation of the switching transistor, so that the stored carrier is rapidly drawn out of the base of the switching transistor.

Abstract translation: 一种用于开关调节器中的主开关晶体管的控制电路，其中通过响应于检测到的误差信号改变三角波脉冲的DC偏置而产生PWM脉冲，并且提供哪些脉冲作为用于接通和关断的控制信号 主开关晶体管。 为了在开关晶体管的每个关断操作时减少由于载流子存储引起的功耗，二极管和电容器由恒定重复频率的方波脉冲产生负电压电位，三角波 形成脉冲，并且施加到NPN晶体管的发射极，NPN晶体管作为响应于误差信号而改变三角波脉冲的DC偏置的可变阻抗电路，从而三角波脉冲被偏置到 负电压电位。 因此，在开关晶体管的每个截止操作时，开关晶体管的基极快速下降到负电压电位，使得存储的载流子被快速地从开关晶体管的基极拉出。

公开(公告)号：US4309752A

公开(公告)日：1982-01-05

申请号：US95803

申请日：1979-11-19

Applicant: Eric J. Stacey

Inventor： Eric J. Stacey

IPC: H02M5/27 ,  H02P13/30

CPC classification number: H02M5/272

Abstract: In power conversion apparatus such as a naturally commutated cycloconverter for use in converting the output of a variable speed generator to a constant frequency, there is provided an end stop control circuit for ensuring commutation of power switching devices that includes timing wave generators for both rectification and inversion end stops. The timing wave generators are phase locked with the generator outputs but are controllable by end stop bias signal derived from a variable system parameter that may be independent of the source, such as load current to provide prompt protection against converter malfunctions due to excess load currents.Further provided is an excess current detector employing, for each phase, a pair of high slew rate, high current unipolar output op amps connected in a voltage follower configuration with a common pull-up resistor and a common load capacitor to develop a peak current signal representing the greater of the positive and negative peaks of the alternating phase current.

Abstract translation: 在诸如用于将变速发电机的输出转换为恒定频率的自然换向循环换流器的功率转换装置中，提供了一种用于确保功率开关装置的换向的终止停止控制电路，其包括用于整流和 反转端停。 定时波发生器与发生器输出相位锁定，但可由可能独立于源的可变系统参数导出的终止偏置信号控制，例如负载电流，以提供对过载电流引起的转换器故障的及时保护。 还提供了一种过电流检测器，对于每个相，采用一对以电压跟随器结构连接的高压摆率，高电流单极性输出运算放大器与公共上拉电阻器和公共负载电容器，以产生峰值电流信号 代表交变相电流的正峰值和负峰值越大。

公开(公告)号：US4307440A

公开(公告)日：1981-12-22

申请号：US106802

申请日：1979-12-26

Applicant: Takashi Inoue ,  Fumio Asano

Inventor： Takashi Inoue ,  Fumio Asano

IPC: H02M3/28 ,  H02M3/335 ,  H02P13/22 ,  H02P13/30

CPC classification number: H02M1/36 ,  H02M3/33546 ,  Y10S323/901

Abstract: A switching voltage regulator (86) is controlled to produce a low output voltage when the power is first turned on and subsequently to produce a high output voltage after a predetermined length of time has elapsed, thereby eliminating overloads due to initial surge currents.

Abstract translation: 控制开关电压调节器（86），以在功率首次导通时产生低输出电压，并且在经过预定时间长度之后产生高输出电压，从而消除由初始浪涌电流引起的过载。

公开(公告)号：US5789928A

公开(公告)日：1998-08-04

申请号：US551389

申请日：1995-11-01

Applicant: Roy S. Baker

Inventor： Roy S. Baker

IPC: G01R23/20 ,  G01R31/40 ,  H02H3/52 ,  G01R21/06 ,  H02P13/30

CPC classification number: G01R23/20 ,  G01R31/40

Abstract: A circuit to discriminate the source of harmonic distortion of the output voltage comprises voltage sensors coupled to the output terminals of a source of electric power and to a point of regulation remote from the source for sensing the output voltage waveform present at each of these locations. The circuit then utilizes these two sensed waveforms to discriminate the source of any harmonic distortion between the source of electric power and the utlization equipment. This circuit calculates the percentage total harmonic content of each of the sensed waveforms, and compares them to determine the source of distortion. If the percentage total harmonic content sensed at the point of regulation is greater than that sensed at the terminals of the source of electric power, the source of distortion is discriminated to be the utilization equipment; otherwise, the source of distortion is identified to be the source of electric power. The circuit also calculates the actual voltage difference between the two sensed voltages, and senses the current flowing in the feeders which is compared with a profile of the normal voltage drop versus connected load to generate an expected voltage drop. The two voltage difference signals are then compared. The circuit indicates the source of the harmonic distortion as the utilization equipment when the actual voltage difference deviates from the expected drop by greater than a predetermined amount.

Abstract translation: 用于区分输出电压的谐波失真源的电路包括耦合到电源的输出端子的电压传感器和远离源极的调节点，用于感测存在于每个这些位置处的输出电压波形。 然后，电路利用这两个感测的波形来区分电力源和ü设备之间的任何谐波失真的来源。 该电路计算每个感测波形的总谐波含量百分比，并将其进行比较以确定失真源。 如果在调节点检测到的总谐波含量百分比大于在电源的端子处感测到的总谐波含量百分比，则将失真源识别为使用设备; 否则，失真源被确定为电源。 电路还计算两个感测电压之间的实际电压差，并且感测馈送器中流动的电流，其与正常电压降与相对负载的分布比较以产生预期的电压降。 然后比较两个电压差信号。 当实际电压差偏离预期下降大于预定量时，电路表示谐波失真的来源作为利用设备。

公开(公告)号：US4812669A

公开(公告)日：1989-03-14

申请号：US66203

申请日：1987-06-25

Applicant: Masatoshi Takeda ,  Kazuo Ikeda ,  Yoshiharu Tominaga ,  Kenji Mori

Inventor： Masatoshi Takeda ,  Kazuo Ikeda ,  Yoshiharu Tominaga ,  Kenji Mori

IPC: G05F1/70 ,  H02J3/01 ,  H02M1/084 ,  H02M1/12 ,  H02P13/30 ,  H02J3/18

CPC classification number: H02J3/01 ,  H02M1/084 ,  Y02E40/40 ,  Y10T307/25

Abstract: A harmonic suppressing device provided in a power system such as, for example, a transmission and distribution system or a power generating system, to filter higher harmonic currents generated by a higher harmonic current source of the power system such as, for example, a cycloconverter. The harmonic suppressing device comprises, as the principal components thereof, a passive filter serving as a high-order higher harmonic filtering unit for filtering higher harmonic currents of comparatively high order among those generated by the higher harmonic current source, and an active filter serving as low-order higher harmonic filtering unit for filtering higher harmonic currents of comparatively low orders among those generated by the higher harmonic current source. The active filter comprises: a main active filtering circuit comprising a plurality of switching transistors, rectifying diodes combined with the switching transistors, respectively, a capacitor, and a reactor; an operating circuit which calculates controlling data for controlling the commutating action of the main active filtering circuit on the basis of the detected values of the higher harmonic currents that flows into the power source side of the power system and the detected values of the output voltage of the higher harmonic current source; and a control circuit which gives control signals such as, for example, pulse width modulating signals to the main active filtering circuit. The harmonic suppressing device is capable of filtering higher harmonic currents in a wide frequency band.

Abstract translation: 一种谐波抑制装置，其设置在例如输配电系统或发电系统的电力系统中，以过滤由电力系统的高次谐波电流源产生的高次谐波电流，例如循环换流器 。 谐波抑制装置作为其主要部件包括用作高次谐波滤波单元的无源滤波器，用于对由高次谐波电流源产生的高次谐波电流进行滤波，并且将有源滤波器用作 低次谐波滤波单元，用于过滤由高次谐波电流源产生的较低阶的较高次谐波电流。 有源滤波器包括：主有源滤波电路，包括多个开关晶体管，分别与开关晶体管组合的整流二极管，电容器和反应器; 运算电路，其基于流入电力系统的电源侧的高次谐波电流的检测值和电力系统的输出电压的检测值，计算用于控制主有源滤波电路的换向动作的控制数据 高次谐波电流源; 以及控制电路，其向主要有源滤波电路提供诸如脉冲宽度调制信号的控制信号。 谐波抑制装置能够在宽频带中滤除高次谐波电流。

公开(公告)号：US4418380A

公开(公告)日：1983-11-29

申请号：US305226

申请日：1981-09-24

Applicant: Shigeru Tanaka ,  Susumu Tadakuma

Inventor： Shigeru Tanaka ,  Susumu Tadakuma

IPC: H02M5/27 ,  H02P13/30

CPC classification number: H02M5/271

Abstract: A circulating current of a cycloconverter in each phase is distributed and controlled in such a way that a circulating current in a phase having a large absolute value of a load current is small, and the circulating current of a phase having a small absolute value of the load current is large. Therefore, the reactive power is so compensated that the sum of lagged reactive powers of the phases and advanced reactive power of a phase advancing capacitor cancel out each other.

Abstract translation: 每相中的循环变换器的循环电流被分布和控制，使得负载电流绝对值大的相位中的循环电流小，并且具有小的绝对值的相位的循环电流 负载电流大。 因此，无功功率得到如此补偿，使得相位提前电容器的相位和高级无功功率的滞后无功功率之和相互抵消。